Energy market: why do electricity prices remain unstable?

For several years, consumers and businesses have faced unprecedented volatility in their energy bills. While major supply crises seem to be easing, a legitimate question remains: why does the pricing situation not stabilize permanently? Understanding the complexity inherent in the electricity market requires analyzing global microeconomic mechanisms, national policy decisions and major environmental challenges at the continental scale.

A price-setting method structurally exposed

To grasp the current instability, one must first take a rigorous look at the technical functioning of the European wholesale market. The cost of electricity there is indexed on the principle of marginal cost, which means the final price is dictated by the last plant called upon to meet peak demand, often a gas-fired thermal plant. Consequently, even if a country has a very decarbonized and fundamentally cheap generation mix, the price of electricity remains structurally correlated with global fossil fuel fluctuations. The slightest international geopolitical tension thus immediately reverberates on the cost of the electron.

The energy transition and the intermittency of renewables

Europe has committed heavily to the ecological transition by developing wind and solar energy on a large scale. However, these clean production sources are by nature intermittent and weather-dependent. When there is no wind or cloud cover is dense, the transmission network must instantly call on much more expensive backup thermal generation to avoid the risk of a blackout. Conversely, during periods of strong overproduction relative to real demand, wholesale prices can collapse and even become negative. This permanent and unpredictable alternation between abundance and scarcity creates extreme daily price variations on energy exchanges.

The return of taxation and the end of public support

During the peak of the inflationary crisis, governments put in place unprecedented price shields to temporarily protect household purchasing power and the competitiveness of industries. The gradual and coordinated withdrawal of these exceptional budgetary measures is now producing a brutal mechanical catch-up effect. The progressive reinstatement of domestic taxes on final consumption, combined with reforms of regulated tariffs, weighs heavily on the final bill received by the customer. Tariffs now incorporate these fiscal adjustments that are essential to state budgets, which prevents any lasting decrease from being noticeable to the general public.

The state of the grid and modernization investments

Finally, the overall stability of an interconnected power grid requires modern, smart and particularly resilient infrastructures. The natural aging of legacy generation fleets (notably the heavy maintenance operations on nuclear reactors) combined with the technical requirement to connect thousands of new, distributed energy sources imposes colossal maintenance investments on network operators. These infrastructure and transmission costs, passed on to bills by regulation, are continually increasing, thus offsetting the phases of decline in wholesale prices.

The chronic instability of electricity prices is not a passing crisis, but the direct reflection of an industrial model in the midst of a profound transformation. Between residual dependence on hydrocarbons, future investments and the reintroduction of taxes, long-term price visibility remains extremely limited. For consumers, optimizing energy efficiency remains the best defense against this persistent volatility.